jQuery Forum

When using the following to open a dialog.  The page in src has a "Cancel" button, but I can't for the life of me figure out the code needed to close the dialog from that button.  I've tried everything I could find via searches and still haven't figured it out.  Can anyone point me in the right direction?

1.     var iframesource = '<div width="100%" id="JQueryPopWin" name="JQueryPopWin" class="JQueryPopWin"><iframe width="100%" ' +
                          'height="100%" ' +
                          'frameborder="0" ' +
                          'name="'+winType+'" id="'+winType+'" class="'+winType+'" ' +
                          'allowtransparencty="true" ' +
                          'style="background-color: transparent;" ' +
                          'src="f?p='+apex_app+':'+pageNum+':'+apex_session+'::NO:'+pageNum+':'+itemNames+':'+itemValues+':"></iframe></div>';
      
       var $dialog = $(iframesource)
                              .dialog({
                                       autoOpen: false,
                                       title: winType,
                                       position: 'center',
                                       width: 800,
                                       height: 660,
                                       modal: true
                              });
   
       $dialog.dialog('open');